I have used these booties for kick boating for years, going on my 3rd pair. Very comfortable and has a retaining nub in the back of the heel to keep your fin strap from slipping off. I learned to get them 1-2 sizes bigger than your wading boots in order to fit thicker socks for belly boating the shoulder seasons - specifically at ice-out when the water is super chilly. I use scuba fins for extra power in the kick, they fit the booties fine but bring one bootie with you when you pick out your fins at the scuba shop to make sure.
Only minor complaint is the zipper can stick when they're old and needs to be waxed a couple times a year.
Also be aware they don't have much ankle support - you can wade a river or hike in them but you'll need to use more caution than your normal boot and the bottom of the bootie has no lugs.